.box {
    width: 100px;
    height: 100px;
    background-color: blueviolet;
    padding: 10px 15px ;
    border: 20px solid #db4848;
    margin: 40px;
    /*box-sizing: border-box;*/
    /*box-sizing: content-box;*/
}
.square{
    width: 0;
    height: 0;
    border-width: 40px;
    border-style: solid;
    border-color: red transparent transparent transparent;
}
.circle{
    width: 232px;
    height: 100px;
    background-color: burlywood;
    border: 10px solid burlywood;
    border-radius: 60px;
}
.square2{
    width: 20px;
    height: 20px;
    background-color: burlywood;
    padding: 10px;
    margin: 10px;
    border-top: burlywood;
    border-left: transparent;
    border-bottom: transparent;
    border-right: transparent;
}